Explanation: This search phrase in a very constructor is accustomed to invoke Yet another constructor of precisely the same class, enabling constructor chaining. The one time it is basically needed is If you have a parameter to a technique Together with the same title to be a member variable. 次のサンプルコードでは、thisを使って同じクラス内の別のコンストラクタを呼び出しています。 https://marcozvsoj.blogpostie.com/53873134/this-jav-an-overview